I'm soo puzzled on which studio gallery is the WN election coverage coming out from... I assume it may be coming out of a temporary gallery built near Brussels, given the fact that the graphics are all "weird" (e.g The ticker strap font is enlarged, the lower thirds have weird spacing issues, the ticker strap cannot show the NC version of the ticker during simulcasts) etc... Perhaps some TV junkie here can give me a clue.
The output from Brussels had no graphics on it, those were added in NBH. I don't have the details of which gallery the BBC World programme was passing through, I think it might have been A.
Well during the Briefing, the lower thirds from the news channel and BBC World News appeared on top of those graphics, almost like the election graphics are coming as part of the feed back from Brussels.
Remember the NC/World graphics are normally added downstream of the studio, hence different programmes can have different graphics even when coming from the same gallery (there have been several photos over the years showing the routing screens for the various Viz engines for this).
I'm also under the impression the graphics used for elections are a completely different template, which while it looks similar to the normal graphics, is optimised for election coverage and the data that entails. If the gallery is adding these graphics on to their output, but the "normal" routing is still in place you will end up with multiple graphics overlaying each other.